Wiring Module

The present disclosure relates to a wiring module.

36 36 A wiring module that is installed in a vehicle such as an electric automobile or a hybrid automobile has been known. A battery wiring module that is disclosed in Japanese Unexamined Patent Application Publication No. 2013-161566 (Patent Document 1 described below) has been known as an example of such a wiring module. The battery wiring module includes busbars each of which connects electrode terminals of a pair of battery cells that are adjacent to each other, detection terminals connected to the busbars, detection wires connected to electric wire connection portions of the detection terminals, busbar housing portions in which the busbars are disposed, and an electric wire housing groove in which the detection wires are disposed. The electric wire housing groove includes a pair of groove walls and a bottom portion and extends along an arrangement direction in which the busbar housing portions are arranged. A pair of electric wire holding piecesA,B for holding the detection wire are formed on and protrude from the groove walls of the electric wire housing groove. The groove wall of the pair of groove walls that is closer to the busbar housing portion includes a cutout portion through which the detection wire extends into the electric wire housing groove from the busbar housing portion side.

Such a battery wiring module has following problems. The detection wire extending from the busbar housing portion into the electric wire housing groove through the cutout portion is routed as follows. The detection wire is contacted with the groove wall that is on an opposite side from the busbar housing portion and curved and extends laterally (along a direction in which the electric wire housing groove extends) and is routed along the groove wall by a reaction force caused by the curving. However, at the curved portion of the detection wire may be out of the electric wire housing groove due to the reaction force.

36 36 In this respect, in the battery wiring module described above, the electric wire holding pieceB protrudes from the groove wall that is on an opposite side from the busbar housing portion. A gap for entry of the detection wire that is formed near a distal end of the electric wire holding pieceB is formed to be closer to the busbar housing portion from the center line with respect to the width direction of the electric wire housing groove. With such a configuration, the curved portion of the detection wire is less likely to be out of the electric wire housing groove.

3 FIG. 3 FIG. 3 FIG. 34 34 34 34 34 34 34 34 In the above battery wiring module, as illustrated inof Patent Document 1, the busbar housing portion and the cutout portion are connected via a barrel holding portion. The barrel holding portion holds the electric wire connection portion of the detection wire. The barrel holding portion extends vertically to the electric wire housing groove. The electric wire housing groove and the busbar housing portion are connected via the barrel holding portion and the cutout portion. A pair of electric wire holding piecesA,B are at upper end edges of the cutout portion and opposite each other. The electric wire holding piecesA,B are provided such that the detection wire extending from the barrel holding portion is not out of the cutout portion. One of the pair of electric wire holding piecesA,B that is closer to the curved portion of the detection wire (on a left side inand referred to on the left side hereinafter) is defined as the left electric wire holding pieceA and another one on the opposite side from the curved portion side (on a right side inand referred to on the right side hereinafter) is defined as the right electric wire holding pieceB.

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2013-161566

34 36 34 34 In the above battery module, the left electric wire holding pieceA is closest to a corner portion, which is between the cutout portion and the electric wire housing groove, and the electric wire holding pieceA in the electric wire housing groove is farther away from the corner portion than the left electric wire holding pieceA is. A connector may be arranged on other end portion of the detection wire opposite from one end portion thereof close to the detection terminal. In such a configuration, when the connector is fitted to a target connector, the detection wire is strongly pulled and curved along the corner portion and routed with a shortest distance. The detection wire is held by the left electric wire holding pieceA at a portion thereof on the cutout portion side with respect to the curved portion; however, there is no electric wire holding portion near a portion of the detection wire on the electric wire housing groove side with respect to the curved portion. Therefore, the curved portion of the detection wire may be out of the electric wire housing groove.

The present disclosure was made in view of the above circumstances. An object is to suppress protrusion of a curved portion of a detection wire out of a housing portion.

A wiring module according to the present disclosure is to be coupled to a battery group including batteries each of which has a pair of electrodes and that are arranged. The wiring module includes detection terminals that are connected to the electrodes or connected to the electrodes via a connection member, detection wires each of which includes a first wire portion that is connected to one of the detection terminals and extends in a vertical direction perpendicular to an arrangement direction in which the batteries are arranged, a second wire portion that extends in the arrangement direction in which the batteries are arranged, and a curved portion that connects the first wire portion and the second wire portion and is curved from the vertical direction to the arrangement direction, a first housing portion in which the first wire portion is arranged, a second housing portion in which the second wire portion is arranged, a third housing portion in which the curved portion is arranged and that includes a corner portion on an inner circumferential side with respect to the curved portion and connects the first housing portion and the second housing portion and has an L-shape and includes a pair of third side walls on two sides of the third housing portion, a pair of outer holding pieces provided corresponding to two end portions of the curved portion, respectively, the pair of outer holding pieces protruding from an outer circumferential side toward the inner circumferential side with respect to the curved portion and holding the curved portion, and a pair of inner holding pieces provided corresponding to the two end portions of the curved portion, respectively, the inner holding pieces protruding from the inner circumferential side toward the outer circumferential side with respect to the curved portion and holding the curved portion. The pair of inner holding pieces at least protrude from one of the pair of third side walls of the third housing portion that is on the inner circumferential side to a tangent line with respect to the corner portion, the tangent line extending at an angle of 45° with respect to the one of the pair of third side walls.

According to the present disclosure, the curved portion of the detection wire is less likely to be out of a housing portion.

First, embodiments according to the present disclosure will be listed and described.

(1) A wiring module according to the present disclosure is to be coupled to a battery group including batteries each of which has a pair of electrodes and that are arranged. The wiring module includes detection terminals that are connected to the electrodes or connected to the electrodes via a connection member, detection wires each of which includes a first wire portion that is connected to one of the detection terminals and extends in a vertical direction perpendicular to an arrangement direction in which the batteries are arranged, a second wire portion that extends in the arrangement direction in which the batteries are arranged, and a curved portion that connects the first wire portion and the second wire portion and is curved from the vertical direction to the arrangement direction, a first housing portion in which the first wire portion is arranged, a second housing portion in which the second wire portion is arranged, a third housing portion in which the curved portion is arranged and that includes a corner portion on an inner circumferential side with respect to the curved portion and connects the first housing portion and the second housing portion and has an L-shape and includes a pair of third side walls on two sides of the third housing portion, a pair of outer holding pieces provided corresponding to two end portions of the curved portion, respectively, the pair of outer holding pieces protruding from an outer circumferential side toward the inner circumferential side with respect to the curved portion and holding the curved portion, and a pair of inner holding pieces provided corresponding to the two end portions of the curved portion, respectively, the inner holding pieces protruding from the inner circumferential side toward the outer circumferential side with respect to the curved portion and holding the curved portion. The pair of inner holding pieces at least protrude from one of the pair of third side walls of the third housing portion that is on the inner circumferential side to a tangent line with respect to the corner portion, the tangent line extending at an angle of 45° with respect to the one of the pair of third side walls.

The angle may not necessarily be 45° but may have a tolerance of ±5°. In such a configuration, the tangent line may extend with respect to the corner portion with an angle range from 40° to 50°. The third side wall may not necessarily protrude to the tangent line but may protrude at least to a position of the tangent line or may protrude further from the position of the tangent line.

The detection wire extends from the first housing portion to the second housing portion via the third housing portion and the curved portion is curved along the third side wall on the outer circumferential side from the upper-bottom direction to the right-left direction due to a reaction force created in the curved portion. However, the curved portion may be out of the third housing portion due to the reaction force. With the wiring module including the pair of outer holding pieces corresponding to the two end portions of the curved portion, respectively, the curved portion of the t detection wire is less likely to be out of the housing portion.

A connector may be provided on other end of two ends of the detection wire that is an opposite end side from the detection terminal and when the detection wire is strongly pulled at the time of fitting of the connector to a target connector, the curved portion of the detection wire is curved along the corner portion of the third housing portion and the detection wire is arranged with a shortest route. In this respect, the pair of inner holding pieces are provided corresponding to the two end portions of the curved portion, respectively. The pair of inner holding pieces protrude from one of the third side walls on the inner circumferential side to the tangent line extending with respect to the corner portion at the angle of 45° with respect to the one of the pair of third side walls. With such a configuration, the curved portion of the detection wire is less likely to be out of the housing portion.

(2) The first housing portion preferably includes a pair of first side walls that are, respectively, continuous to the pair of third side walls. A pair of first holding pieces are preferably on the pair of first side walls so as to be opposite each other and the pair of first holding pieces hold the first wire portion. A third space formed between one of the pair of outer holding pieces and one of the pair of inner holding pieces that are close to the first housing portion in the third housing portion and are opposite each other and a first space between the pair of first holding pieces preferably have a same dimension and are on a same straight line extending in the vertical direction.

The same dimension may not be necessarily a strictly same dimension but means that the first space and the third space overlap with at least 50% of the entire dimensions of the spaces with a vertical view. The spaces may have dimensions such that the detection wire can be arranged in the first housing portion and the third housing portion with extending straight.

With the third space and the first space having the same dimension and being on the same straight line, the detection wire can be arranged and routed in the first housing portion and the third housing portion with the detection wire extending straight in the vertical direction. Therefore, the routing operation of the detection wire can be improved.

The pair of first holding pieces preferably have distal ends having a mountain shape and the first space is formed between the distal ends of the pair of first holding pieces and the first space is preferably a smallest space between the pair of first holding pieces. The distal end of the one of the pair of outer holding pieces and the distal end of the one of the pair of inner holding pieces preferably have a mountain shape and the third space is formed between the distal end of the one of the pair of outer holding pieces and the distal end of the one of the pair of inner holding pieces close to the first housing portion in the third housing portion and the third space is preferably a smallest space between the distal ends of the one of the pair of outer holding pieces and the one of the pair of inner holding pieces.

With the distal end of the outer holding piece and the distal end of the inner holding piece having a mountain shape, the smallest space through which the detection wire hardly passes becomes smaller and therefore, the workability of routing the detection wire is further improved.

Embodiments according to the present disclosure will be described. The present disclosure is not limited to the embodiments. All modifications within and equivalent to the technical scope of the claimed invention may be included in the technical scope of the present invention.

1 11 FIGS.to 10 20 An embodiment of the present disclosure will be described with reference to. A battery moduleincluding a wiring moduleaccording to this embodiment is installed in a vehicle as a power source for driving a vehicle such as an electric automobile or a hybrid automobile. In the following description, regarding components having the same configuration, some of the components may be indicated by reference signs and others may not be indicated by the reference signs. In the following description, it is considered that an X arrow, a Y arrow, and an Z arrow point the front side, the left side, and the upper side, respectively. In this embodiment, an upper-bottom direction is one example of a vertical direction and a right-left direction is one example of an arrangement direction.

10 11 20 11 10 15 11 15 15 11 15 11 15 15 15 3 FIG. 1 FIG. The battery moduleincludes a battery stack memberL illustrated inand the wiring modulethat is attached to the battery stack memberL. As illustrated in, the battery moduleof this embodiment further includes a casingthat covers the battery stack memberL from four sides, that are from upper, lower, right, and left sides. The casingincludes a bottom portionA that is placed on a lower surface side of the battery stack memberL, a ceiling portionB that is placed on an upper surface side of the battery stack memberL, and a pair of side portionsC that connect the bottom portionA and the ceiling portionB on the right and left sides.

3 FIG. 3 FIG. 4 FIG. 11 11 11 11 11 11 12 12 11 11 12 As illustrated in, the battery stack memberL includes laminated type batteries(eighteen laminated type batteries in this embodiment) that are stacked in the right-left direction. Only a front section of the battery stack memberL is illustrated in. As illustrated in, the laminated type batteryhas a flat shape that is elongated in a front-rear direction and has a small thickness in the right-left direction. The laminated type batteriesinclude power storage elements (not illustrated) therein. The laminated type batteryincludes a pair of electrode leads. The pair of electrode leadsare on front and rear sides of the laminated type battery, respectively, and protrude from the laminated type batteryin opposite directions. The pair of electrode leadshave a plate shape and have opposite polarities.

3 5 FIGS.and 3 FIG. 11 13 12 11 13 12 13 12 13 12 12 12 12 12 12 11 11 13 11 13 11 13 As illustrated in, the battery stack memberL includes connection portions. The four electrode leadsof the laminated type batteriesthat are arranged adjacent to each other in the right-left direction are electrically connected at the connection portion. The four electrode leadsare bent leftward or rightward at a right angle and overlapped and connected with laser welding and thus, the connection portionsare formed. Some of the electrode leadsthat are configured as the connection portionsare defined as connection electrode leadsA. Among the four connection electrode leadsA, the two connection electrode leadsA on the right side and the two connection electrode leadsA on the left side have opposite polarities. For example, the two connection electrode leadsA on the right side have a positive polarity and the two connection electrode leadsA on the left side have a negative polarity. Therefore, in the battery stack memberL, the two laminated type batteriesthat are connected in parallel are connected series via the connection portion. As illustrated in, the battery stack memberL includes four connection portionson a front section. The battery stack memberL includes four connection portionson a rear section, although it is not illustrated.

13 12 13 12 13 12 12 Since a process of forming the connection portionsincludes a process of bending the electrode leadsand a process of laser welding, tolerances of the connection portions(and the connection electrode leadsA) with respect to the front-rear direction are particularly likely to become large. For example, in this embodiment, the tolerance of the connection portion(and the connection electrode leadA) with respect to the front-rear direction is a large value compared to a thickness of the electrode lead(0.2 mm, 0.4 mm).

3 5 FIGS.and 11 14 11 14 12 12 13 14 12 14 12 12 14 14 11 14 11 14 11 As illustrated in, the battery stack memberL includes an output portionon a left edge portion of a front section. The battery stack memberL also includes the output portionon a right edge portion of a front section, although it is not illustrated. Among the electrode leads, the two electrode leads, which are not configured as the connection portion, are connected and configured as the output portion. The electrode leadsthat are configured as the output portionare defined as output electrode leadsB. The two output electrode leadsB that are configured as the output portionhave a same polarity. The output portionis configured as a positive polarity or a negative polarity of the whole battery stack memberL. Namely, with the output portionon the front section having a positive polarity of the whole battery stack memberL, the output portionon the rear section has a negative polarity of the whole battery stack memberL.

1 FIG. 20 30 12 40 12 45 30 50 30 40 45 20 10 20 10 20 10 As illustrated in, the wiring moduleof this embodiment includes detection terminalsthat are connected to the connection electrode leadsA, a busbarthat is connected to the output electrode leadsB, detection wiresthat are connected to the detection terminals, and a protectorthat holds the detection terminals, the busbar, and the detection wires. In the following, a configuration of the wiring modulethat is arranged on a front side of the battery modulewill be described in detail. The wiring modulearranged on a rear side of the battery module, which is not illustrated, has a configuration similar to that of the wiring modulearranged on the front side of the battery module.

40 40 40 40 40 40 40 40 40 53 50 40 12 41 40 2 FIG. The busbarhas a plate shape and is made by processing a metal plate having electrically conductive properties. As illustrated in, the busbarincludes a first portionA that extends in an upper-bottom direction and a second portionB that is connected to an upper end portion of the first portionA. The first portionA has a flat shape having a small thickness in the front-rear direction. The second portionB extends rightward from the upper end portion of the first portionA and has a flat shape having a small thickness in the upper-bottom direction. The busbaris held in a busbar holding portionof the protectorand a middle portion of the first portionA in the upper-bottom direction is connected to the output electrode leadB. A busbar side connection portionis at a right end portion of the second portionB.

1 FIG. 41 41 41 41 41 10 As illustrated in, the busbar side connection portionhas a through holeA through which a bolt is inserted. An external connection terminal, which is not illustrated, is disposed on the busbar side connection portionand fixed to the busbar side connection portionwith the bolt. Accordingly, the busbar side connection portionis electrically connected to the external connection terminal. The external connection terminal is used for connecting the battery moduleand an external device, which is not illustrated.

45 45 30 11 45 48 45 50 50 11 30 The detection wireincludes a core wire and an insulating sheath that covers the core wire. One end of each detection wireis connected to the detection terminalthat detects a voltage of each laminated type battery. Other ends of the detection wiresare collectively connected to a connector. The detection wiresare routed in a routing recess portionA of the protectorand in predetermined positions. Detection wires in claims include a device that detects a current and temperature of each laminated type batteryand electric wires connected to a controller in addition to the electric wires connected to the detection terminals.

2 FIG. 48 48 48 48 48 11 11 As illustrated in, the connectorincludes a housingA that is made of synthetic resin having insulating properties and a male terminalB arranged in the housingA. The connectoris to be fitted to a target connector (not illustrated) including a female terminal. The target connector is connected to an external ECU (electronic control unit) via an electric wire, which is not illustrated. The ECU has a known configuration including a microcomputer and components and has a function of detecting a voltage, a current, and a temperature of each laminated type batteryand has a function of controlling charging and discharging of each laminated type battery.

30 30 31 32 31 34 31 31 30 31 54 54 54 54 30 54 2 FIG. The detection terminalis formed by processing an electrically conductive metal plate. As illustrated in, the detection terminalincludes a body portion, a connection portionextending rightward from the body portion, and an electric wire connection portionextending upward from the body portion. The body portionis a right portion of the detection terminaland has a rectangular front view shape. The body portionis arranged in a terminal housing portionsuch that a plate thickness direction thereof corresponds to the front-rear direction. A terminal holding portionA is in a lower end portion of the terminal housing portion. The terminal holding portionA holds the detection terminalin the terminal housing portion.

32 31 32 31 32 13 12 13 30 12 12 13 45 32 12 5 FIG. The connection portionhas an elongated rectangular shape extending in the right-left direction and is on a same plane as the body portion. The connection portionextends upward and downward than the body portionin the upper-bottom direction. As illustrated in, the connection portionis configured to be surface-contacted with a portion of the connection portionor a portion of the connection electrode leadA that is configured as the connection portion. Namely, the detection terminalis not for connecting the adjacent connection electrode leadsA but for connecting the connection electrode leadsA that are previously connected (the connection portion) and the detection wire. Therefore, the dimension of the connection portionwith respect to the upper-bottom direction may be smaller than the dimension of the connection electrode leadsA with respect to the upper-bottom direction.

1 FIG. 2 FIG. 50 50 51 15 11 52 51 52 52 52 13 12 52 12 14 As illustrated in, the protectoris made of synthetic resin having insulating properties and has a plate shape. The protectorincludes a protector bodythat is positioned with respect to the casing(and the battery stack memberL). As illustrated in, electrode housing recess portionsare arranged in the right-left direction in a middle section of the protector bodywith respect to the upper-bottom direction. The electrode housing recess portionsare through the front-rear direction and have an elongated rectangular shape extending in the upper-bottom direction. The electrode housing recess portionincludes connection electrode housing recess portionsA that receive the connection portionand the connection electrode leadsA and an output electrode housing recess portionB that receives the output electrode leadB and the output portion.

2 FIG. 52 53 40 53 40 53 54 30 52 54 51 As illustrated in, the output electrode housing recess portionB includes busbar holding portions, which hold the busbar, on upper and lower portions thereof. A bolt fixing portionA for fixing the busbarwith a screw is on a right side of the upper busbar holding portion. The terminal housing portionin which a portion of the detection terminalis arranged is on a lower left side of the connection electrode housing recess portionA. The terminal housing portionis recessed rearward from the protector body.

50 51 54 50 54 45 30 54 50 50 55 56 57 55 54 56 55 57 55 56 The routing recess portionA is recessed rearward from the protector bodysimilar to the terminal housing portion. The inner space of the routing recess portionA is continuous to the inner space of the terminal housing portion. The detection wireextending from the detection terminalthat is arranged in the terminal housing portionis arranged in the routing recess portionA. The routing recess portionA includes a first housing portion, a second housing portion, and a third housing portion. The first housing portionis continuous and extend upward in the upper-bottom direction from the terminal housing portion. The second housing portionis on an upper side of the first housing portionand extends in the right-left direction. The third housing portionconnects the first housing portionand the second housing portion.

55 52 56 52 57 55 56 55 57 52 45 The first housing portionis adjacent to and on the right side of the connection electrode housing recess portionA. The second housing portionis adjacent to and on an upper side of the connection electrode housing recess portionA. The third housing portionhas a L-shape and connects an upper end portion of the first housing portionand a left end portion of the second housing portionthat is on an upper right side of the first housing portion. A corner portionB is on an upper left side of the connection electrode housing recess portionA and on an inner circumferential side of a curved portionC, which will be described next.

45 45 45 45 45 30 11 45 11 45 45 45 45 45 45 45 50 48 45 45 45 57 6 FIG. The detection wireincludes a first wire portionA, a second wire portionB, and the curved portionC. The first wire portionA is connected to the detection terminaland extends in the upper-bottom direction that is a direction vertical to an arrangement direction in which the laminated type batteriesare arranged. The second wire portionB extends in the right-left direction that is the arrangement direction in which the laminated type batteriesare arranged. The curved portionC connects the first wire portionA and the second wire portionB and is curved from an end of the first wire portionA extending in the upper-bottom direction toward an end of the second wire portionB extending in the right-left direction. The detection wireincludes an extra length portion that is necessary when the detection wireis routed in the routing recess portionA or when the connectoris fitted to a target connector. Therefore, as illustrated in, a reaction force is created in the curved portionC and therefore, the curved portionC of the detection wireis arranged along an outer circumferential portion of the third housing portion.

45 45 55 45 45 56 45 45 57 57 45 57 6 FIG. The first wire portionA of the detection wireis arranged in the first housing portion, the second wire portionB of the detection wireis arranged in the second housing portion, and the curved portionC of the detection wireis arranged in the third housing portion. More in detail, a L-shaped section surrounded by a dotted line illustrated inis defined as the third housing portionand an area where the curved portionC is arranged is defined as the third housing portion.

57 57 57 57 57 57 57 57 57 57 57 57 57 57 Two side portions of the third housing portionare defined by a pair of third side wallsA. A pair of third side wallsA on a lower end side are opposite each other with respect to the right-left direction. A pair of third side wallsA on a right end side are opposite each other with respect to the upper-bottom direction. Among the pair of third side wallsA on the lower end side, the third side wallA on the right side is defined as the third side wallA on an outer circumferential side and the third side wallA on the left side is defined as the third side wallA on an inner circumferential side. Similarly, among the pair of third side wallsA on the right end side, the third side wallA on the upper side is defined as the third side wallA on the outer circumferential side and the third side wallA on the lower side is defined as the third side wallA on the inner circumferential side.

58 59 57 58 45 58 45 45 59 45 59 45 45 A pair of outer holding piecesand a pair of inner holding piecesare formed on the two end portions of the third housing portion. The pair of outer holding piecesare provided corresponding to the two end portions of the curved portionC, respectively. The outer holding piecesprotrude from the outer circumferential side toward the inner circumferential side with respect to the curved portionC and hold the curved portionC from the front side. The pair of inner holding piecesare provided corresponding to the two end portions of the curved portionC, respectively. The inner holding piecesprotrude from the inner circumferential side toward the outer circumferential side with respect to the curved portionC and hold the curved portionC from the front side.

58 45 45 57 45 59 45 45 48 45 57 The outer holding piecesare provided such that the detection wireis less likely to be out of the housing portion when the detection wireis disposed away from the corner portionB and closer to the outer circumferential side due to the reaction force created in the detection wirehaving the extra length portion. The inner holding piecesare provided such that the detection wireis less likely to be out of the housing portion when the detection wireis pulled at the time of fitting of the connectorto a target connector or when the detection wirehaving no extra length portion is disposed near the corner portionB and closer to the inner circumferential side.

58 58 57 57 58 57 59 59 57 57 59 57 More in detail, the pair of outer holding piecesinclude the outer holding piecethat protrudes downward from the upper one of the right third side wallsA of the third housing portionand the outer holding piecethat protrudes rightward from the left one of the lower third side wallsA. On the other hand, the pair of inner holding piecesinclude the inner holding piecethat protrudes upward from the lower one of the right third side wallsA of the third housing portionand the inner holding piecethat protrudes leftward from the right one of the lower third side wallsA.

58 59 45 50 45 58 58 The pair of outer holding pieceshave a protrusion dimension that is smaller than the protrusion dimension of the pair of inner holding pieces. The detection wireis normally routed in the routing recess portionA with having an extra length portion. Therefore, the two end portions of the curved portionC are disposed behind the outer holding piecesdue to the reaction force and are held by the outer holding piecesfrom the front side.

55 55 57 57 61 55 61 45 61 55 61 55 The first housing portionincludes a pair of first side wallsA that are, respectively, continuous to lower ends of the pair of third side wallsA that are on the lower end side of the third housing portion. A pair of first holding piecesare on the pair of first side wallsA so as to be opposite each other. The first holding pieceshold the first wire portionA. The first holding pieceon the left side protrudes rightward from the left first side wallA and the first holding pieceon the right side protrudes leftward from the right first side wallA.

58 59 57 3 61 1 1 3 1 3 45 50 45 7 FIG. A space is between the outer holding pieceand the inner holding piecethat are on the lower end side of the third housing portionand opposite each other and the space is defined as a third space S. A space between the pair of first holding piecesis defined as a first space S. As illustrated in, the first space Sand the third space Shave a substantially same dimension and are on a same straight line L extending in the upper-bottom direction. With the first space Sand the third space Sbeing provided as described above, the detection wirecan be arranged in the routing recess portionA with the detection wireextending straight. Therefore, the routing operation can be performed easily and workability is improved.

61 1 61 61 3 58 59 57 58 59 45 50 45 45 The first holding pieceshave distal ends having a mountain shape. The first space Sis formed between the distal ends of the first holding piecesand is a smallest space between the first holding pieces. The third space Sis formed between a distal end of the outer holding pieceand a distal end of the inner holding pieceon the lower end side of the third housing portionand is a smallest space between the outer holding pieceand the inner holding piece. When the detection wireis routed in the routing recess portionA, it is most difficult to insert the detection wirethrough the smallest space; however, with the above configuration, the smallest space has a shortest dimension in the upper-bottom direction, and therefore, the routing workability of the detection wireis further improved.

59 59 57 57 62 58 59 58 59 62 59 57 62 57 59 57 8 11 FIGS.to Next, the arrangement of the inner holding pieceswill be described with reference to. The pair of inner holding pieceis in a closest position that is closest to the corner portionB of the third housing portion. Removal holesare behind the outer holding piecesand the inner holding pieces. Molding dies for molding the outer holding piecesand the inner holding piecesare removed through the removal holes. As the pair of inner holding piecesare provided closer to the corner portionB with considering manufacturing tolerances, an area between the pair of removal holesbecomes smaller. This lowers strength of a bottom portion of the third housing portion. Therefore, the closest position previously described is a position in which the pair of inner holding piecescan be provided closest to the corner portionB without causing the problem of lowering of the strength.

8 FIG. 45 48 45 59 45 57 57 59 45 45 59 45 59 As illustrated in, with the detection wirebeing strongly pulled when the connectoris fitted to a target connector, the detection wireis arranged with a shortest route. If the pair of inner holding piecesare not arranged in the closest position, the detection wiremay be out of the third housing portionfrontward near the corner portionB. In this respect, the pair of inner holding piecesare arranged in the closest position in this embodiment. Therefore, with the detection wirebeing arranged with the shortest route, the detection wireis arranged behind the pair of inner holding pieces. Accordingly, the detection wireis surely held by the pair of inner holding piecesfrom the front side.

45 45 59 57 45 57 45 45 59 57 45 57 58 59 45 45 50 9 FIG. 10 FIG. The curved portionC of the detection wireis behind the inner holding piecein a lower end portion of the third housing portionillustrated in. With such a configuration, the curved portionC is less likely to be out of the third housing portionfrontward. Similarly, the curved portionC of the detection wireis behind the inner holding piecein a right end portion of the third housing portionillustrated in. With such a configuration, the curved portionC is less likely to be out of the third housing portionfrontward. A space dimension of the smallest space that is between the distal end of the outer holding pieceand the distal end of the inner holding pieceis same as or smaller than the outer diameter of the detection wire. Therefore, the detection wireis less likely to be out of the routing recess portionA via the smallest space.

45 59 45 57 57 57 57 57 59 57 59 59 59 59 57 11 FIG. The reason why the detection wirecan be surely held by the pair of inner holding pieceswhen the detection wireis disposed in the shortest route will be described with reference to. First, a tangent line T to the corner portionB is drawn at an angle of 45° with respect to the third side wallA. The tangent line T is a tangent line T to the corner portionB and the angle formed between the tangent line T and each of the third side wallsA on the lower end side and the right end side of the third housing portionis 45°. Each of the inner holding piecesprotrudes from the third side wallA on the inner circumferential side to the tangent line T. Each inner holding piecehas a pair of oblique sidesA at a distal end thereof. One of the oblique sidesA of each inner holding piecethat is closer to the corner portionB extends along the tangent line T.

45 45 59 59 45 59 45 59 57 45 57 With the detection wirebeing in a shortest route, the detection wireis routed on an inner circumferential side with respect to the tangent line T at the positions of the inner holding pieces. Therefore, with the inner holding piecesprotruding to the tangent line T, the detection wireis surely disposed behind the inner holding pieces. Therefore, the detection wireis held by the pair of inner holding piecesin two end portions of the third housing portionand the detection wireis less likely to be out of the housing portion frontward at the corner portionB.

According to the embodiment, operations and effects described below are obtained.

20 11 11 11 12 20 30 12 45 55 56 57 58 59 45 45 45 45 45 30 45 45 45 45 45 55 45 56 45 57 57 57 45 57 55 56 57 58 45 58 45 45 59 45 59 45 45 57 57 59 57 57 57 The wiring moduleaccording to the embodiment is to be coupled to the battery stack memberL including the laminated type batteriesthat are arranged. Each of the laminated type batteriesincludes a pair of electrode leads. The wiring moduleincludes the detection terminalsthat are connected to the electrode leads, the detection wires, the first housing portion, the second housing portion, the third housing portion, and a pair of outer holding pieces, and a pair of inner holding pieces. The detection wireincludes the first wire portionA, the second wire portionB, and the curved portionC. The first wire portionA is connected to the detection terminaland extends in the upper-bottom direction. The second wire portionB extends in the right-left direction. The curved portionC connects the first wire portionA and the second wire portionB and is curved from the upper-bottom direction toward the right-left direction. The first wire portionA is arranged in the first housing portion, the second wire portionB is arranged in the second housing portion, and the curved portionC is arranged in the third housing portion. The third housing portionincludes the corner portionB on an inner circumferential side with respect to the curved portionC. The third housing portionconnects the first housing portionand the second housing portion. The third housing portionhas an L-shape. The pair of outer holding piecesare provided corresponding to the two end portions of the curved portionC, respectively. The outer holding piecesprotrude from the outer circumferential side toward the inner circumferential side with respect to the curved portionC and hold the curved portionC. The pair of inner holding piecesare provided corresponding to the two end portions of the curved portionC, respectively. The inner holding piecesprotrude from the inner circumferential side toward the outer circumferential side with respect to the curved portionC and hold the curved portionC. The pair of third side wallsA are configured as the two side portions of the third housing portion. The pair of inner holding piecesprotrude from one of the third side wallsA on the inner circumferential side to the tangent line T extending with respect to the corner portionB at the angle of 45° with respect to the third side wallA.

45 55 56 57 45 57 45 45 45 57 20 58 45 45 45 The detection wireextends from the first housing portionto the second housing portionvia the third housing portionand the curved portionC is curved along the third side wallA on the outer circumferential side from the upper-bottom direction to the right-left direction due to a reaction force created in the curved portionC. However, the curved portionC of the detection wiremay be out of the third housing portiondue to the reaction force. With the wiring moduleincluding the pair of outer holding piecescorresponding to the two end portions of the curved portionC, respectively, the curved portionC of the detection wireis less likely to be out of the housing portion.

48 45 30 45 48 45 45 57 57 45 59 45 57 57 59 57 57 57 45 45 The connectoris provided on other end of the two ends of the detection wirethat is an opposite end side from the detection terminal. When the detection wireis strongly pulled at the time of fitting of the connectorto a target connector, the curved portionC of the detection wireis curved along the corner portionB of the third housing portionand the detection wireis arranged with a shortest route. In this respect, the pair of inner holding piecesare provided corresponding to the two end portions of the curved portionC, respectively. The pair of third side wallsA are configured as the two side portions of the third housing portion. The pair of inner holding piecesprotrude from one of the third side wallsA on the inner circumferential side to the tangent line T extending with respect to the corner portionB at the angle of 45° with respect to the third side wallsA. With such a configuration, the curved portionC of the detection wireis less likely to be out of the housing portion.

55 55 57 61 55 61 45 3 58 59 55 57 1 61 In the embodiment, the first housing portionincludes a pair of first side wallsA that are, respectively, continuous to the pair of third side wallsA. The pair of first holding piecesare on the pair of first side wallsA so as to be opposite each other. The first holding pieceshold the first wire portionA. The third space Sformed between the outer holding pieceand the inner holding piecethat are on the first housing portionside in the third housing portionand opposite each other and the first space Sbetween the pair of first holding pieceshave a same dimension and are on a same straight line L extending in the upper-bottom direction.

3 1 45 55 57 45 45 With the third space Sand the first space Shaving the same dimension and being on the same straight line L, the detection wirecan be arranged and routed in the first housing portionand the third housing portionwith the detection wireextending straight in the upper-bottom direction. Therefore, the routing operation of the detection wirecan be improved.

61 1 61 61 58 59 3 58 59 55 57 58 59 In the embodiment, the distal ends of the first holding pieceshave a mountain shape. The first space Sis formed between the distal ends of the first holding piecesand is a smallest space between the first holding pieces. The distal end of the outer holding pieceand the distal end of the inner holding piecehave a mountain shape. The third space Sis formed between the distal end of the outer holding pieceand the distal end of the inner holding pieceon the first housing portionside of the third housing portionand is a smallest space between the outer holding pieceand the inner holding piece.

58 59 45 45 With the distal end of the outer holding pieceand the distal end of the inner holding piecehaving a mountain shape, the smallest space through which the detection wirehardly passes becomes smaller and therefore, the workability of routing the detection wireis further improved.

30 13 12 30 13 12 (1) In the above embodiment, the detection terminalis directly connected to the connection portion(the connection electrode leadA) ; however, the detection terminalmay be connected to the connection portion(the connection electrode leadA) via a connection member such as a busbar.

61 61 (2) In the above embodiment, the pair of first holding piecesare provided in one portion; however, pairs of first holding piecesmay be provided in multiple portions.

58 59 61 (3) In the above embodiment, the distal ends of the outer holding piecesand the distal ends of the inner holding piecesand the distal ends of the first holding pieceshave a mountain shape; however, they may not have the mountain shape but may have a circular arched shape or a flat shape extending the upper-bottom direction.

12 13 (4) In the above embodiment, the four electrode leadsare connected and configured as the connection portion; however, the configuration is not limited to the above one as long as the connection portion is configured by connecting multiple electrode leads.

10 : Battery module 11 : Laminated type battery (battery) 11 L: Battery stuck member (battery group) 12 : Electrode lead (electrode) 12 A: Connection electrode lead 12 B: Output electrode lead 13 : Connection portion 15 : Casing 15 A: Bottom portion 15 B: Ceiling portion 15 C: Side portion 20 : Wiring module 30 : Detection terminal 31 : Body portion 32 : Connection portion 34 : Wire joint portion 40 : Busbar 40 A: First portion 40 B: Second portion 41 : Busbar side connection portion 41 A: Through hole 45 : Detection wire 45 A: First wire portion 45 B: Second wire portion 45 C: Curved portion 48 : Connector 48 A: Housing 48 B: Male terminal 50 : Protector 50 A: Routing recess portion 51 : Protector body 52 : Electrode housing recess portion 52 A: Connection electrode housing recess portion 52 B: Output electrode housing recess portion 53 : Busbar holding portion 53 A: Bolt fixing portion 54 : Terminal housing portion 54 A: Terminal holding portion 55 : First housing portion 55 A: First side wall 56 : Second housing portion 56 : Second housing portion 57 : Third housing portion 57 A: Third side wall 57 B: Corner portion 58 : Outer holding piece 59 : Inner holding piece 59 A: Oblique side 60 : Tangent line 61 : First holding piece 62 : Removal hole L: straight line 1 S: First space 3 S: Third space T: Tangent line